src/print.sml

   1 (* HCoop Domtool (http://hcoop.sourceforge.net/)
   2  * Copyright (c) 2006, Adam Chlipala
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  17  *)
  18
  19 (* Pretty-printing Domtool configuration file ASTs *)
  20
  21 signature PRINT_ARG = PRINTFN_INPUT where type rendering = unit
  22
  23 structure PrintArg :> PRINT_ARG = struct
  24
  25 structure SM = TextIOPP
  26
  27 structure PD = PPDescFn(SM)
  28 open PD
  29
  30 val keyword = string
  31 val punct = string
  32 val field = string
  33 val lit = string
  34 val ident = string
  35
  36 val context = string
  37 val typ = string
  38 val exp = string
  39
  40 fun anchor (_, d) = d
  41 fun link (_, d) = d
  42
  43 type rendering = unit
  44 fun openStream () = SM.openOut {dst = TextIO.stdOut, wid = 80}
  45 fun closeStream s = (SM.newline s; SM.closeStream s)
  46
  47 end
  48
  49 structure Print = PrintFn(PrintArg)